Cells are subjected to cyclic loads under physiological conditions, which regulate cellular structures and functions. Recently, it was demonstrated that cells on substrates reoriented nearly perpendicular to the stretch direction in response to uni-axial cyclic stretches. Though various theories were proposed to explain this observation, the underlying mechanism, especially at the molecular level, is still elusive. To provide insights into this intriguing observation, we employ a coupled finite element analysis (FEA) and Monte Carlo method to investigate the stability of a cluster of slip bonds upon cyclic loads. Our simulation results indicate that the cluster can become unstable upon cyclic loads and there exist two characteristic failure modes: gradual sliding with a relatively long lifetime versus catastrophic failure with a relatively short lifetime. We also find that the lifetime of the bond cluster, in many cases, decreases with increasing stretch amplitude and also decreases with increasing cyclic frequency, which appears to saturate at high cyclic frequencies. These results are consistent with the experimental reports. This work suggests the possible role of slip bonds in cellular reorientation upon cyclic stretch.
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November 2014
Research-Article
Probing the Instability of a Cluster of Slip Bonds Upon Cyclic Loads With a Coupled Finite Element Analysis and Monte Carlo Method
Xiaofeng Chen,
Xiaofeng Chen
Department of Engineering Mechanics,
Zhejiang University
,Hangzhou 310027
, China
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Bin Chen
Bin Chen
1
Department of Engineering Mechanics,
e-mail: chenb6@zju.edu.cn
Zhejiang University
,Hangzhou 310027
, China
e-mail: chenb6@zju.edu.cn
1Corresponding author.
Search for other works by this author on:
Xiaofeng Chen
Department of Engineering Mechanics,
Zhejiang University
,Hangzhou 310027
, China
Bin Chen
Department of Engineering Mechanics,
e-mail: chenb6@zju.edu.cn
Zhejiang University
,Hangzhou 310027
, China
e-mail: chenb6@zju.edu.cn
1Corresponding author.
Contributed by the Applied Mechanics Division of ASME for publication in the JOURNAL OF APPLIED MECHANICS. Manuscript received June 17, 2014; final manuscript received August 20, 2014; accepted manuscript posted August 28, 2014; published online September 17, 2014. Editor: Yonggang Huang.
J. Appl. Mech. Nov 2014, 81(11): 111002 (7 pages)
Published Online: September 17, 2014
Article history
Received:
June 17, 2014
Revision Received:
August 20, 2014
Accepted:
August 28, 2014
Citation
Chen, X., and Chen, B. (September 17, 2014). "Probing the Instability of a Cluster of Slip Bonds Upon Cyclic Loads With a Coupled Finite Element Analysis and Monte Carlo Method." ASME. J. Appl. Mech. November 2014; 81(11): 111002. https://doi.org/10.1115/1.4028437
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